年级学科：GradeSevenEnglish课题：ChapterThreeTheworldofnumbers(PeriodOne)课型：New主备人：Diane审核人：审定人：【学习目标】Tolearnmorenumbersexceptcardinalandordinalnumbers.【重点难点】Tounderstandwhatisadecimalnumber,aprotractor,oddnumbers,evennumbers,afraction,adegreeandapercentage.【教学关注点】教学情境的创设;探究式教学的实施;信息技术与学科教学的整合;教学难点分散、重点突出;开放性习题的设计。【预习导学】1.Whendoweusenumbers?2.Whatnumbersdoyouknow?3.Trytosaythefollowingnumbers:(1)1993年10月1日;1987年12月25日;2002年10月2日;1993年6月4日;1988年12月7日;1887年10月5日;2001年8月10日(2)Saythefollowingcardinalnumbersandtheirordinalnumbers:1;2;3;5;8;9;12;13;20;31;100;2000;10,000,000;310(3)房号：502；1103；1205(4)7年级5班；8年级6班；9年级12班(5)Time:8:20;9:15;7:40;11:45;10:30(6)Phonenumber:39215143;30105100;35651351;37245566;34710122;39781121;33894167;335643994.Trytofindoutmoreexpressionsofnumbers.【合作探究】1.Checkoutthecontentsinpreparation.2.Togivedetailexpressionsofdifferentnumbersaccordingtothestudentsstudies.(1)Adecimalnumberiswrittenasadot(.)followedbynumbersrepresentingtenths,hundredths,etc.(e.g.,0.62=sixtenths,twohundredths).(2)Aprotractorisusuallyintheformofasemicircle,withdegrees(0°-180°)markedonit.(3)Oddnumberscannotbedividedbytwotogiveawholenumberwithoutafraction.(4)Evennumberscanbedividedbytwotogiveawholenumber.(5)Afractionistheexactdivisionofanumber(e.g.,1/2，2/3，etc.).(6)Adegree(°)isaunitofmeasurementforangles(e.g.,10°tendegrees)ortemperature(e.g.,2°CtwodegreesCentigrade).(7)Apercentage(%)isanumberineachhundred.3.Somemoreexpressions:(1)Weoftentalkaboutapairofcompassesfordrawingcircles.Acompassisadevicewithamagneticneedlewhichtellsdirection.(2)Zero(0)isnothing/naught/nil/oh.(3)Plus(+)isthesignforaddition(e.g.,2+2=4).(4)Minus(-)isthesignforsubtraction(e.g.,4-2=2).(5)Tomultiply(×)istofindthetotalyougetwhenyouaddanumbertoitselfanumberoftimes(e.g.,4×3=4+4+4=12).(6)Todivide(÷)istofindouthowmanytimesonenumberiscontainedinanother(e.g.,16÷4=4).(7)Equals(=)meansisofthesameamount,size,value,etc.【训练巩固】1.Tomatchthefollowing:1).decimal112).even÷3).eq